Hot-air furnace



(No Model.) 2 Sheets-Sheet -2.

W. W. KELSEY.

HOT AIR FURNACE.

No. 415,870. Patented Nov. 26, 1889.

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WW5 W l 7 l 4.; ATTORNEYS UNITED STATES PATENT OEEicE,

\VILLIAM V. KELSEY, OF CORTLAND, NEV YORK.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 415,870, dated November 26, 1889.

Application filed June a 1889,

=-T0 aZZ whom it may concern:

Be it known that I, \VILLIAM XV. KELSEY, of Cortland, in the county of Cortland, in the State of New York, have invented new and useful Improvements in Hot-Air Furnaces, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention consists in a novel organization of a hot-air furnace which is comparatively simple, inexpensive, and compact, and possesses superior heating capacity, as hereinafter fully described, and specifically set forth in the claims.

In the annexed drawings, Figure 1 is a front elevation of a hot-air furnace embodying my invention, a portion of the outer casing and shell of the combustion-chamber beingbroken away to present the exterior sides of the hollow walls and the subjacent cold-air chamber. Fig. 2 is a vertical transverse section on line a n, Fig. 3. Figs. 3, 4, 5, and 6 are horizontal transverse sections, respectively, on lines w w, 1 y, as w, and .2 z; and Fig. 7 is an enlarged detached vertical transverse section of the upper portions of two of theadjacent hollow walls.

Similar letters of reference indicate corresponding parts.

A represents the fire-pot, and L the subjacent ash-pit. The fire-pot is surrounded by a cold-air chamber B, which is provided with a suitable cold-air inlet 0, and has its top plate provided with a series of ports 0 c c, distributed in an annular row around the exterior of the fire-pot, and another series of perforations Z Z Z distributed in like manner near the periphery of said top plate. Upon the top plate of the said cold-air chamber, near the outer edge thereof, is mounted the jacket E and the combustion-chamber D, which is in side of the jacket concentric therewith and a suflicient distance from the same to form an air-passage d between them, the air entering into said passage from the cold-air chamber 15 through the perforations Z H. The jacket extends over the top of the combustion-chamber and forms a dome G, from the center of which is suspended the magazine F.

In the combustion-chamber D is arranged a series of air-fines C O O, which communicate with the cold-air chamber B through the Serial No. 313,618. (No model.).

ports 0 c c, and are provided at their upper ends with ports f f, by which they communicate with the dome G. The said flues are formed with broad sidewalls, which converge toward the central portion of the combustionchamber, or toward the fuel-magazine F, and are corrugated externally and internally in vertical planes. The fines are arranged with fire-passages between them and around their inner and outer walls, and when the furnace is in operation the products of combustion rising from the fire-pot are forced partially radially outward through the fire-passages between the flues by the magazine F, occupying the central portion of the combustion-chamher. The corrugations of the side walls of the fines are so arranged as to bring the convex portions of each of said walls opposite the concave portions of the adjacent wall, and thus form serpentine vertical passages for the products of combustion between the fines and also serpentine vertical passages for the air passing through the said flues. Thereby the heating-surfaces are an gmented and said surfaces are presented to the best advantage for effectually heating the air in the fines, The heated air enters the dome G, to which are connected the usual pipes I I, which conduct the said air to the apartments of the building to be heated.

at and a represent the direct and indirect exit-pipes, which are connected, respectively, to the upperand lower portions of the combustion-chamber, and are provided with suitable dampers i c, for regulating the draft.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination with the fire-pot A, coldair chamber B, surrounding the fire-pot, combustion-chamber D, mounted 011 the cold-air chamber, and the dome G over the combustion-chamber, the flues O C, communicating at opposite ends with said cold-air chamber and dome and formed with broad walls converging toward the central portion of the combustion-chamber, and having said walls corrugated in vertical planes internally and externally, fire-passages between the said flues and around the outer and inner walls thereof, direct and indirect exit-fines a and a, connected to the combustion-chamber, and 110tair-pipes I I, extended from the dome, substantially as described and shown.

2. The combination of the fire-pot A', coldair chamber B, surrounding the fire-pot, combustion-chamber D, mounted on the cold-air chamber, jacket E, surrounding the combustion-chamber and formed with the dome G, the magazine F, the fines C C, communicating at opposite ends with the cold-air chamber and dome and formed with broad Walls converging toward the magazine and corrugatedexternally and internally in vertical planes, fire-passages between said fines and around the outer and inner walls thereof, direct and indirect exit-flues a a, connected, respect- 15 tended from the dome, substantially as de- 20 scribed and shown.

XVILLIAM W'. KELSEY.

Vitnesses:

J. J. LAASS, H. M. SEAMANS. 

